The number of U.S. taxpayers renouncing citizenship or permanent-resident status surged to a record high in the second quarter, as new laws aimed at cracking down on overseas assets increase the cost of complying and the risk of a taxpayer misstep.
A total of 1,130 names appeared on the latest list of renunciations from the Internal Revenue Service, according to Andrew Mitchel, a tax lawyer in Centerbrook, Conn., who tracks the data. That is far above the previous high of 679, set in the first quarter, and more than were reported in all of 2012.
Taxpayers aren't required to explain the move, but experts said the recent rise is likely due to tougher laws and enforcement.
"The IRS crackdown on U.S. taxpayers living abroad seems to be having an effect," said Mr. Mitchel.
The IRS declined comment.
Lags in reporting renunciations might mean that many who appeared on the current list made the move months earlier. Taxpayers who renounced can be subject to an exit tax, and people who renounced last year may have avoided higher taxes on capital gains and income that went into effect in 2013.
The U.S. is rare in that all income earned by citizens and permanent residents, even those living abroad, can be subject to U.S. tax, according to Bryan Skarlatos, a New York lawyer. The U.S. also confers citizenship on people who are born on American soil.